US6320314B1 - Electricity introducing member for vessels - Google Patents

Electricity introducing member for vessels Download PDF

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Publication number
US6320314B1
US6320314B1 US09/269,757 US26975799A US6320314B1 US 6320314 B1 US6320314 B1 US 6320314B1 US 26975799 A US26975799 A US 26975799A US 6320314 B1 US6320314 B1 US 6320314B1
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United States
Prior art keywords
closing member
silica
gradient material
functional gradient
silicon dioxide
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Expired - Lifetime
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US09/269,757
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English (en)
Inventor
Tetuya Torikai
Yukiharu Tagawa
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Rotatek Finland Oy
Ushio Denki KK
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Ushio Denki KK
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Assigned to USHIODENKI KABUSHIKI KAISHA reassignment USHIODENKI KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TAGAWA, YUKIHARU, TORIKAI, TETUYA
Assigned to ROTATEK FINLAND OY reassignment ROTATEK FINLAND OY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PYRHONEN, JUHA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/361—Seals between parts of vessel
    • H01J61/363—End-disc seals or plug seals

Definitions

  • the invention relates to an electrical inlet body for a tube lamp, such as a discharge lamp, a halogen lamp, or the like.
  • the silicon dioxide end has a coefficient of thermal expansion which is roughly equal to the coefficient of thermal expansion of the silicon dioxide which forms the arc tube, while the molybdenum end has the property that its coefficient of thermal expansion approaches the coefficient of thermal expansion of the tungsten or molybdenum which forms the upholding parts of the electrodes. These properties are suitable for a sealing body of a discharge lamp.
  • a functional gradient material as the sealing body can also be used not only for a discharge lamp, but also for a halogen lamp provided with a luminous filament or a halogen heating apparatus provided with a filament because the arc tube consists of silica glass.
  • the invention is characterized in an electrical inlet body for a tube lamp in that a functional gradient material of an electrically conductive component and silicon dioxide is used as the dielectric component, that several combined layers are placed on top of one another cylindrically and incrementally, the volumetric ratio (%) of silicon dioxide in this functional gradient material being designated n 1 , n 2 , n 3 , . . . , nx (n 1 >n 2 >n 3 > . . .
  • nx that furthermore L/D ⁇ 2, when the diameter of this cylindrical functional gradient material is labelled D (mm) and the total thickness of the combined layers with a volumetric ratio of silicon dioxide of greater than 80% is labellea L (mm), and that the upholding parts of the electrodes proceeding from the side of the n 1 layer are shrunk as far as the combined layers with a volumetric ratio of silicon dioxide of at least less than or equal to 80%.
  • the invention is furthermore characterized in that for (1) d/D is in the range from 0.12 to 0.6 , when the diameter of the electrode carrier is labeled d (mm).
  • FIG. 1 shows a schematic partial cross section of a discharge lamp for which a functional gradient material is used
  • FIG. 2 shows a schematic cross section of an electrical inlet body for a tube lamp
  • FIG. 3 shows a schematic which details an electrical inlet body as claimed in the invention
  • FIG. 4 shows a schematic of the pressing process in the formation of a functional gradient material
  • FIG. 5 shows a schematic of the result of a visual check of the state of a complete electrical inlet body for a tube lamp.
  • FIG. 1 schematically shows a discharge lamp for which the above described functional gradient material is used.
  • reference number 1 labels a discharge lamp with an arc tube 2 and sealing tube 6 consisting of silica glass.
  • Reference number 7 labels a sealing body which is cylindrical and which consists of silicon dioxide and molybdenum.
  • One end of the sealing body 7 (the side towards the arc tube) is rich in silicon dioxide and dielectric, while the other end (the side away from the arc tube) is rich in molybdenum and electrically conductive. This means that the sealing body 7 is a functional gradient material.
  • the dielectric face of the sealing body 7 is adjacent to the discharge space of the discharge lamp.
  • the sealing tubes 6 formed on the two ends of the arc tube 2 are hermetically welded in the areas of the sealing body 7 which are rich in silicon dioxide, that is, in the dielectric areas.
  • Reference number 8 labels a metal strip.
  • FIG. 2 schematically shows an electrical inlet body for a tube lamp for which one such functional gradient material is used, in cross section.
  • the expression “electrical inlet body” is defined as a one-part arrangement of the sealing body consisting of functional gradient material with the upholding parts of the electrodes.
  • FIG. 3 is a schematic of an electrical inlet body by which the invention is detailed.
  • the layers are placed on top of one another in rows, the volumetric ratio (%) of silicon dioxide being labelled n 1 , n 2 , n 3 , . . . , nx (n 1 >n 2 >n 3 > . . . nx).
  • the combined layers are continuously staggered from the electrically conductive component to the dielectric component.
  • layers n 1 to nq have a volumetric ratio of silicon dioxide of greater than 80%, while layers n(q+1) to nx have a volumetric ratio of silicon dioxide of less than or equal to 80%.
  • Reference letter D labels the diameter of the respective layer or the sealing body and reference letter L labels the entire thickness of the superimposed homogenous layers (n 1 to nq) with a volumetric ratio of silicon dioxide of greater than 80%.
  • molybdenum is often used as the electrically conductive component and silicon dioxide as the dielectric component.
  • silicon dioxide is often used as the dielectric component.
  • a combination of molybdenum with silicon dioxide is also used.
  • a silicon dioxide powder is mixed with molybdenum powder such that the content is different;
  • the respective mixed powder is mixed using a ball mill. In this way several mixed powders are produced in which the contents differ from one another;
  • a mixed powder with the lowest molybdenum concentration as the layer is inserted from a bottom component 11 of a casting mold 10 provided with a cylindrical mold space, by which the n 1 layer is formed, as is shown in FIG. 4 . Then, by introducing the mixed powder with the second lowest molybdenum concentration layer by layer the n 2 layer is formed.
  • mixed powders with altered molybdenum concentrations are inserted layer by layer in the required number of layers and afterwards pressed and molded by a press body 12 .
  • a layer structure is formed in which several formed layers are placed in one piece on top of one another.
  • FIG. 4 feasibly shows a state with five layers.
  • the silicon dioxide-rich face of this layer structure is provided with insertion openings for the upholding parts of the electrodes. Afterwards the upholding parts of the electrodes are inserted into the openings and complete sintering is done. In the following the invention is described using examples of numerical values.
  • a molybdenum powder with an average grain size of 1.0 micron and a silicon dioxide power with an average grain size of 5.6 microns were prepared and 17 different mixed powders each with an altered volumetric ratio of silicon dioxide were produced.
  • the respective mixed powder was mixed with stearic acid (a solution with roughly 23%), by which one granulate at a time was obtained.
  • n 1 is 100, n 2 it is 99.5, n 3 98.9, n 4 98.3, n 5 97.7, n 6 94.9, n 7 91.6, n 8 87.7, n 9 86.4, n 10 82.3, n 11 80.0, n 12 75.6, n 13 60.8, n 14 53.7, n 15 45.0, n 16 34.0, and n 17 19.6, when n 1 , n 2 , n 3 , . . . n 17 in the sequence of greater volumetric ratio are assigned to a smaller volumetric ratio of silicon dioxide.
  • n 1 , n 2 , n 3 , . . . to n 17 the cylindrical casting mold 10 was filled with these granulates as shown in FIG. 4 .
  • the granulates were compressed by the press body 12 with a load of 6 t/cm 2 in the axial direction, a cylindrical compacted body having been obtained.
  • the thickness (mm) of the respective compressed layer after molding in the case of n 1 was 2.0, n 2 to n 3 1.0, n 4 to n 10 0.5, n 11 to n 16 0.7 and n 17 , 2.
  • the compacted bodies were sintered in hydrogen gas at 1200° C. for 30 minutes In this way the organic binder was removed.
  • the above described average grain sizes of the molybdenum powder and the silicon dioxide powder, the conditions for removal of the organic binder, the amount of loading in the molding of the functional gradient material and the like are not limited to the above described conditions.
  • the faces of the functional gradient material on the n 1 side were provided with insertion openings for the upholding parts of the electrodes.
  • the tungsten upholding parts of the electrodes were inserted and sintered for five minutes in a vacuum atmosphere at 1820° C. Thus complete sintering was done to shrink the upholding parts of the electrodes.
  • the functional gradient material with a diameter of 2 mm, 2.5 mm, 3 mm and 4 mm was combined with tungsten upholding parts of the electrodes with a diameter of 0.3 mm, 0.5 mm, 0.6 mm, 1.2 mm and 1.6 mm.
  • tungsten upholding parts of the electrodes with a diameter of 0.3 mm, 0.5 mm, 0.6 mm, 1.2 mm and 1.6 mm was produced.
  • FIG. 5 shows the result using a table.
  • the table in FIG. 5 shows that, for No. 1 and No. 7, in the electrical insertion bodies with a value L/D of greater than or equal to 2, the upholding parts of the electrodes with complete sintering of the functional gradient material could not support deformation as a result of nonuniformities of the density within the layer and as a result of softening of the functional gradient material, and bending-as-fault occurred, in No. 1 and No. 7, where the tips of the upholding parts of the electrodes in the functional gradient not reaching the layers with a volumetric ratio of silicon dioxide of less than or equal to 80%.
  • the upholding parts of the electrodes of tungsten or molybdenum are shrunk up to the layers with a volumetric ratio of silicon dioxide of the cylindrical functional gradient material of less than or equal to 80%. This measure prevents bending and cracking in the functional gradient material.
  • an electrical inlet body for a tube lamp can be obtained which can be reliably welded to the silica glass sealing tube of the tube lamp.
  • d/D i.e. the relation between the diameter d (mm) of the upholding parts of the electrodes and the diameter D (mm) of the cylindrical functional gradient material, is in the range from 0.12 to 0.6, an electrical inlet body for a tube lamp is obtained which can be reliably welded to the silica glass sealing tube of the tube lamp without bending and cracking in the functional gradient material.
  • the electrical inlet body as claimed in the invention can be used for a tube lamp such as a metal halide lamp, a mercury lamp or the like, and for a filament lamp such as a halogen lamp or the like.

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  • Vessels And Coating Films For Discharge Lamps (AREA)
US09/269,757 1997-09-08 1998-09-08 Electricity introducing member for vessels Expired - Lifetime US6320314B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP25800097A JP3736710B2 (ja) 1997-09-08 1997-09-08 管球用電気導入体
JP9-258000 1997-09-08
PCT/JP1998/004012 WO1999013493A1 (fr) 1997-09-08 1998-09-08 Element d'introduction d'electricite pour enceintes

Publications (1)

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US6320314B1 true US6320314B1 (en) 2001-11-20

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ID=17314151

Family Applications (1)

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US09/269,757 Expired - Lifetime US6320314B1 (en) 1997-09-08 1998-09-08 Electricity introducing member for vessels

Country Status (5)

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US (1) US6320314B1 (fr)
EP (1) EP0938126B1 (fr)
JP (1) JP3736710B2 (fr)
DE (1) DE69817530T2 (fr)
WO (1) WO1999013493A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040108814A1 (en) * 2002-09-11 2004-06-10 Koito Manufacturing Co., Ltd Arc tube for discharge bulb
WO2009037063A1 (fr) * 2007-09-19 2009-03-26 Osram Gesellschaft mit beschränkter Haftung Lampe à décharge haute pression

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1043754B1 (fr) * 1999-04-06 2004-05-26 Ushiodenki Kabushiki Kaisha Scellement pour lampes utilisant un matériau à gradient fonctionnel
DE10038841C1 (de) * 2000-08-04 2001-12-20 Heraeus Gmbh W C SiO¶2¶-Glaskolben mit mindestens einer Stromdurchführung, Verfahren zur Herstellung einer gasdichten Verbindung zwischen beiden sowie ihre Verwendung in einer Gasentladungslampe
EP2833396B1 (fr) * 2012-03-29 2021-06-09 Kyocera Corporation Élément de canal d'écoulement, échangeur de chaleur pourvu d'un élément de canal d'écoulement et appareil de fabrication de semi-conducteurs pourvu d'un élément de canal d'écoulement

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4881009A (en) 1983-12-05 1989-11-14 Gte Products Corporation Electrode for high intensity discharge lamps
EP0650184A1 (fr) 1992-07-09 1995-04-26 Toto Ltd. Structure de la partie de scellement d'un tube a decharge et procede de fabrication
JPH10175514A (ja) 1996-12-20 1998-06-30 Mk Seiko Co Ltd 洗車装置
JPH10188897A (ja) 1996-12-26 1998-07-21 Ushio Inc 高圧放電ランプ
JPH10280009A (ja) 1997-04-11 1998-10-20 Ushio Inc 傾斜機能材料、ランプ用封止部材およびその製造方法
JPH10289691A (ja) 1997-04-11 1998-10-27 Ushio Inc 傾斜機能材料を使った閉塞体
US5861714A (en) * 1997-06-27 1999-01-19 Osram Sylvania Inc. Ceramic envelope device, lamp with such a device, and method of manufacture of such devices
US6107740A (en) * 1997-06-30 2000-08-22 Ushiodenki Kabushiki Kaisha Plugging structure for vessels
EP1043754A1 (fr) * 1999-04-06 2000-10-11 Ushiodenki Kabushiki Kaisha Scellement pour lampes utilisant un matériau à gradient fonctionnel
US6175188B1 (en) * 1997-09-28 2001-01-16 Ushiodenki Kabushiki Kaisha Sealing body for a discharge lamp
US6194832B1 (en) * 1997-06-27 2001-02-27 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Metal halide lamp with aluminum gradated stacked plugs

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3407564B2 (ja) * 1996-10-18 2003-05-19 東陶機器株式会社 発光管の封止部用キャップの製造方法
JPH10172514A (ja) * 1996-12-12 1998-06-26 Toto Ltd ランプ

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4881009A (en) 1983-12-05 1989-11-14 Gte Products Corporation Electrode for high intensity discharge lamps
EP0650184A1 (fr) 1992-07-09 1995-04-26 Toto Ltd. Structure de la partie de scellement d'un tube a decharge et procede de fabrication
JPH10175514A (ja) 1996-12-20 1998-06-30 Mk Seiko Co Ltd 洗車装置
JPH10188897A (ja) 1996-12-26 1998-07-21 Ushio Inc 高圧放電ランプ
JPH10280009A (ja) 1997-04-11 1998-10-20 Ushio Inc 傾斜機能材料、ランプ用封止部材およびその製造方法
JPH10289691A (ja) 1997-04-11 1998-10-27 Ushio Inc 傾斜機能材料を使った閉塞体
US5861714A (en) * 1997-06-27 1999-01-19 Osram Sylvania Inc. Ceramic envelope device, lamp with such a device, and method of manufacture of such devices
US6194832B1 (en) * 1997-06-27 2001-02-27 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Metal halide lamp with aluminum gradated stacked plugs
US6107740A (en) * 1997-06-30 2000-08-22 Ushiodenki Kabushiki Kaisha Plugging structure for vessels
US6175188B1 (en) * 1997-09-28 2001-01-16 Ushiodenki Kabushiki Kaisha Sealing body for a discharge lamp
EP1043754A1 (fr) * 1999-04-06 2000-10-11 Ushiodenki Kabushiki Kaisha Scellement pour lampes utilisant un matériau à gradient fonctionnel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, vol. 1998, No. 10, Aug. 31, 1998, JP 10 125284 A, Toto Ltd., May 15, 1998, English Abstract.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040108814A1 (en) * 2002-09-11 2004-06-10 Koito Manufacturing Co., Ltd Arc tube for discharge bulb
WO2009037063A1 (fr) * 2007-09-19 2009-03-26 Osram Gesellschaft mit beschränkter Haftung Lampe à décharge haute pression
US20100301745A1 (en) * 2007-09-19 2010-12-02 Osram Gesellschaft Mit Beschraenkter Haftung High pressure discharge lamp
US8115390B2 (en) 2007-09-19 2012-02-14 Osram Ag High pressure discharge lamp
CN101802973B (zh) * 2007-09-19 2012-05-16 欧司朗股份有限公司 高压放电灯

Also Published As

Publication number Publication date
EP0938126B1 (fr) 2003-08-27
EP0938126A4 (fr) 2000-04-19
JP3736710B2 (ja) 2006-01-18
DE69817530T2 (de) 2004-06-17
DE69817530D1 (de) 2003-10-02
WO1999013493A1 (fr) 1999-03-18
JPH1186794A (ja) 1999-03-30
EP0938126A1 (fr) 1999-08-25

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